From Miami to Madison: Investigating the relationship between climate and terrestrial net primary production
Article first published online: 20 JUL 2007
Copyright 2007 by the American Geophysical Union.
Global Biogeochemical Cycles
Volume 21, Issue 3, September 2007
How to Cite
2007), From Miami to Madison: Investigating the relationship between climate and terrestrial net primary production, Global Biogeochem. Cycles, 21, GB3004, doi:10.1029/2006GB002705., , , and (
- Issue published online: 20 JUL 2007
- Article first published online: 20 JUL 2007
- Manuscript Accepted: 4 MAY 2007
- Manuscript Revised: 28 MAR 2007
- Manuscript Received: 6 FEB 2006
- terrestrial net primary productivity;
- Miami Model;
- carbon cycle
 The 1973 “Miami Model” was the first global-scale empirical model of terrestrial net primary productivity (NPP), and its simplicity and relative accuracy has led to its continued use. However, improved techniques to measure NPP in the field and the expanded spatial and temporal range of observations have prompted this study, which reexamines the relationship of climatic variables to NPP. We developed several statistical models with paired climatic variables in order to investigate their relationships to terrestrial NPP. A reference data set of 3023 NPP field observations was compiled for calibration and parameter optimization. In addition to annual mean temperature and precipitation, as in the Miami Model, we chose more ecologically relevant climatic variables including growing degree-days, a soil moisture stress index, and photosynthetically active radiation (PAR). Calculated annual global NPP ranged from 36 to 74 Pg-C yr−1, comparable with previous studies. Comparisons of geographic patterns of NPP were made using biome and latitudinal averages.